Greenscreen Motion Tracking Tape at DVinfo.net

Go Back   DV Info Net > Cross-Platform Post Production Solutions > Digital Compositing and Effects

Digital Compositing and Effects
After Effects, Shake and everything else.


Reply
 
Thread Tools Search this Thread
Old March 28th, 2008, 08:40 PM   #1
Tourist
 
Join Date: Feb 2008
Location: Fredericton, Canada
Posts: 2
Greenscreen Motion Tracking Tape

Hello, this is my first post.

I am working on some stuff that was shot on a greenscreen. I have motion tracked the footage but am having a problem getting rid of the tracking points on the walls (what looks to be masking tape, very white).

I am working in After Effects and have used keylight to get rid of the green then did an autotrace for the masking. When I do the autotrace it puts a mask around the performer and a mask around every white X on the walls.

I've tried to delete the masks that I don't need (all except the performer) but it looks like autotrace changes the numbering of masks as it goes through time. I am guessing when the performer moves in front of an X then the number of masks on screen changes and the resulting numbering sequence gets all gimpy.

So i guess I am looking for some guidance on how to get rid of the white tracking markers that were on the greenscreen wall. Or more specifically where in the After Effects workflow I have gone wrong.

Thanks

Darren
Attached Thumbnails
Greenscreen Motion Tracking Tape-picture-1.png   Greenscreen Motion Tracking Tape-picture-2.png  

Darren Odonnell is offline   Reply With Quote
Old April 1st, 2008, 12:09 PM   #2
Regular Crew
 
Join Date: Dec 2005
Location: Chicago, IL
Posts: 140
Increase the number of pixels that the auto-trace uses as it minimum area. I forget that actual name of the field in the dialog box for that, but my guess is that you left it set at 0. Increase that to maybe 10 to 50 pixels, and "test" it.
Andrew J Morin is offline   Reply With Quote
Old April 1st, 2008, 02:08 PM   #3
Major Player
 
Join Date: Jun 2007
Location: Hamilton Ontario
Posts: 769
Do you have real estate to create a garbage matte?? That might help a bit..
Peter Manojlovic is offline   Reply With Quote
Old April 3rd, 2008, 09:47 AM   #4
Regular Crew
 
Join Date: Dec 2005
Location: Chicago, IL
Posts: 140
Another thought: if you've keyed the footage, the tracking marks should already be gone. Perhaps you need to increase the 'strength' of the key, to pull the trackers out. Or you may do well to use //two// keylight effects, the first to pull out the trackers only, set the result display ("final result" is the default, "status" will show the Alpha mask...) to "Intermediate Result," (which shuts off keylight's color correction routines) then use a second keylight effect to pull the screen out, and set that to "final result." Then you'll be able to trace the foreground only.
Andrew J Morin is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Cross-Platform Post Production Solutions > Digital Compositing and Effects

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 02:37 AM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network